Cove base



FIG. 1 is a rear perspective view of a "cove base" showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear perspective view of an alternate embodiment thereof;

FIG. 5 is a front perspective view of the alternate embodiment shown in FIG. 4; and,

FIG. 6 is a bottom plan view of the alternate embodiment. 

The ornamental design for a "cove base", as shown and described. 